package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    /****
     * 新增菜品，同时插入菜品数据，需要操作两张表：dish，dish_flavor
     *
     * @param dishDTO
     */
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //向菜品表插入一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);

        Long dishId = dish.getId();
        //向口味表插入多条数据
        //先拿到菜品的口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /***
     * 菜品分页查询
     * @param id
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /***
     * 批量删除菜品
     * @param ids
     */
    @Override
    public void delete(List<Long> ids) {
        //判断菜品状态,在售中的菜品不能删除
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断菜品是否被套餐关联,如果被关联，则无法删除
        List<Long> setmealIds = setmealDishMapper.getsetmealIdByDishId(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }

        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);

    }

    /***
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithhFlavor(Long id) {
        //首先查询菜品数据
        Dish dish = dishMapper.getById(id);
        //查询菜品口味数据
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(flavors);
        //组装VO数据并返回
        return dishVO;
    }

    /***
     * 修改菜品信息，同时需要更新对应的口味数据
     * @param dishDTO
     */
    @Override
    public void update(DishDTO dishDTO) {
        //修改菜品表数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        //先删除菜品表中的口味数据
      dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //再插入新的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    /***
     * 批量起售停售
     * @param status
     * @param ids
     */
    @Override
    public void startOrStop(Integer status, Long id) {

        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.update(dish);
    }

    /***
     * 条件查询
     * @param dish
     * @return
     */
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
